Retailers targeted by sophisticated ModPOS malware

The ModPOS malware has already hit multiple national retailers and compromised millions of cards, according to new research released this morning, but there are likely to be more infections still out there since this particular malware is extremely difficult to detect.

"The way that the malware is able to hide itself makes it extremely difficult for retailers to detect with existing capabilities," said Stephen Ward, senior director at Dallas-based cyber threat intelligence firm iSight Partners, Inc.

It took months for researchers to get a clear view of this malware and reverse engineer it, he said, and then the researchers have spent a month informing retailers about how to spot it.